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A kind of nickel-titanium alloy, preparation method and application thereof, nickel-titanium alloy component

A technology of nickel-titanium alloy, cold and heat cycle, applied in the field of alloys, can solve the problem that nickel-titanium alloy is difficult to have a stable phase transition temperature, etc.

Active Publication Date: 2022-07-12
SUZHOU RES INST SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a nickel-titanium alloy, its preparation method and application, and a nickel-titanium alloy component to solve the technical problem that it is difficult for nickel-titanium alloys to have a stable phase transition temperature

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  • A kind of nickel-titanium alloy, preparation method and application thereof, nickel-titanium alloy component
  • A kind of nickel-titanium alloy, preparation method and application thereof, nickel-titanium alloy component
  • A kind of nickel-titanium alloy, preparation method and application thereof, nickel-titanium alloy component

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preparation example Construction

[0052] The embodiment of the present invention also provides a method for preparing a nickel-titanium alloy, which is used for the preparation of the above-mentioned nickel-titanium alloy, and the preparation method includes:

[0053] Quenching the nickel-titanium alloy after the solid solution to room temperature to obtain a first nickel-titanium alloy, and performing at least one cold-heat cycle on the first nickel-titanium alloy,

[0054] The thermal cycle includes at least completing an austenite to martensite and a martensite to austenite transformation of the first nickel-titanium alloy.

[0055] The cooling and heating cycle adopts the method of first heating up from room temperature, then cooling and then heating up to room temperature, which can make the nickel-titanium alloy complete the phase transformation from austenite to martensite, and the phase transformation from martensite to austenite, which is also beneficial to Energy saving. In addition, the maximum tem...

Embodiment 1

[0064] (1) Select a nickel-titanium alloy with a composition of Ti-50.8 at. % Ni (the Ni content is 50.8 at. % atomic ratio), solution-treated at 1000° C. for 2 hours, and then quenched to room temperature;

[0065] (2) cold and heat cycles are carried out to the quenched nickel-titanium alloy for 2 times;

[0066] (3) The nickel-titanium alloy after the cold and heat cycle is placed at room temperature for 24h, that is, the nickel-titanium alloy with stable phase transition temperature is obtained;

[0067] (4) The nickel-titanium alloy with stable phase transition temperature was subjected to 16 cooling and heating cycles.

Embodiment 2

[0069] (1) Select a nickel-titanium alloy with a composition of Ti-50.8 at. % Ni (the Ni content is 50.8 at. % atomic ratio), solution-treated at 800° C. for 2 hours, and then quenched to room temperature;

[0070] (2) cold and heat cycles are carried out 5 times to the quenched nickel-titanium alloy;

[0071] (3) placing the nickel-titanium alloy after the cold-heat cycle at room temperature for 1 week to obtain a nickel-titanium alloy with stable phase transition temperature;

[0072] (4) The nickel-titanium alloy with stable phase transition temperature was subjected to cooling and heating cycles for 15 times.

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Abstract

The invention discloses a nickel-titanium alloy, a preparation method and application thereof, a nickel-titanium alloy component, and relates to the field of alloys to solve the technical problem that the nickel-titanium alloy is difficult to have a stable phase transition temperature in the prior art. The nickel-titanium alloy of the embodiment of the present invention has a stable phase transition temperature, and the nickel-titanium alloy is prepared by the following method: the first nickel-titanium alloy is subjected to at least one thermal cycle to obtain a second nickel-titanium alloy, the second nickel-titanium alloy is The titanium alloy is placed at a preset temperature for a preset time and subjected to low-temperature (room temperature to 100° C.) aging treatment to obtain the nickel-titanium alloy; the cold-heat cycle at least includes making the first nickel-titanium alloy complete austenite to martensitic phase transformation, and the transformation from martensite to austenite. The invention also discloses a preparation method for the above nickel-titanium alloy. The nickel-titanium alloy provided by the present invention is used in shape memory materials.

Description

technical field [0001] The present disclosure relates to the field of alloys, in particular to a nickel-titanium alloy, a preparation method and application thereof, and a nickel-titanium alloy component. Background technique [0002] As a metal smart material, NiTi shape memory alloys have functional properties such as shape memory effect and superelasticity. In practical application, nickel-titanium alloys generally undergo repeated phase transformation processes, and the phase transition temperature will gradually decrease with the increase of the number of thermal excitations, resulting in the phase transition temperature deviating from the original set temperature range, so that the memory alloy cannot be used in Shape changes occur within a preset temperature range. [0003] In the prior art, thermal cycle training is generally used to eliminate the problem of unstable phase transition temperature, but it is still not enough to achieve stability of the phase transitio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/10
CPCC22F1/006C22F1/10C22F1/002
Inventor 王协彬席瑞姜浩
Owner SUZHOU RES INST SHANDONG UNIV